# Relative Roughness of pipes

Relative Roughness of pipes!!!

## Homework Statement

Here is the Data:

Reservoir Water Entry Pipeline Pipeline Pipeline
Number Level Coeff. Length Diameter Roughness
m [AHD] [m] [m] [mm]
0 20.665 0.814 432.453 1.222 0.089
1 17.787 0.544 111.972 1.361 0.147
2 11.166 0.583 201.258 1.171 0.076

## Homework Equations

I need to solve this three reservoir problem, but I'm stuck in finding the Reynold's number and Friction factor from Relative densities. Relative roughness is just (Pipeline Roughness/Pipe Diameter). From Moody Diagram, the highest Relative roughness is 0.05 and I can't see anything higher than that, but the values I get are all higher than 0.05 for relative roughness.

## The Attempt at a Solution

Is there a solution to this?